Current transformer determining an operating state
The current transformer addresses the challenge of detecting ECM motor states by using a frequency-tuned electronic assembly to differentiate between on and off states based on higher frequency current signals, enhancing detection accuracy.
Patent Information
- Authority / Receiving Office
- EP · EP
- Patent Type
- Applications
- Current Assignee / Owner
- SENVA
- Filing Date
- 2025-12-23
- Publication Date
- 2026-06-24
AI Technical Summary
Current transformers struggle to reliably detect the operating state of electronically commutated motors (ECM) due to their low run current and high quiescent current, which reduces the difference in current between on and off states, and are insensitive to the higher harmonic frequencies of ECM motors.
A current transformer with a current sensor and electronic assembly tuned to detect current signals in a frequency range greater than or equal to 100Hz, using a tuning capacitor optimized for higher frequencies, and an electronic assembly with components like a comparator and potentiometer to determine the operating state of powered devices.
The solution enables accurate and reliable detection of ECM motor states by utilizing higher frequency current differences, improving detection accuracy and reliability.
Smart Images
Figure IMGAF001_ABST